CC1021-RTR1 datasheet(64/91 Pages) TI1

64 / 91 page

Not Recommended for New Designs NRND

CC1021

SWRS045D – JANUARY 2006 – REVISED JANUARY 2015

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Table 5-23. FREQ_1A Register (05h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

FREQ_1A[7:0]

177

—

Bit 15 to 8 of frequency control word A

Table 5-24. FREQ_0A Register (06h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

FREQ_0A[7:1]

FREQ_A[6:0]

124

—

7 LSB of frequency control word A

FREQ_0A[0]

DITHER_A

Enable dithering for frequency A

Table 5-25. CLOCK_A Register (07h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

CLOCK_A[7:5]

REF_DIV_A[2:0]

—

Reference frequency divisor (A):

0: Not supported

1: REF_CLK frequency = Crystal frequency / 2

…

7: REF_CLK frequency = Crystal frequency / 8

It is recommended to use the highest possible reference clock

frequency that allows the desired Baud rate.

CLOCK_A[4:2]

MCLK_DIV1_A[2:0]

—

Modem clock divider 1 (A):

0: Divide by 2.5

1: Divide by 3

2: Divide by 4

3: Divide by 7.5 (2.5 × 3)

4: Divide by 12.5 (2.5 × 5)

5: Divide by 40 (2.5 × 16)

6: Divide by 48 (3 × 16)

7: Divide by 64 (4 × 16)

CLOCK_A[1:0]

MCLK_DIV2_A[1:0]

—

Modem clock divider 2 (A):

0: Divide by 1

1: Divide by 2

2: Divide by 4

3: Divide by 8

MODEM_CLK frequency is FREF frequency divided by the product of

divider 1 and divider 2.

Baud rate is MODEM_CLK frequency divided by 8.

Table 5-26. FREQ_2B Register (08h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

FREQ_2B[7:0]

FREQ_B[22:15]

131

—

8 MSB of frequency control word B

Table 5-27. FREQ_1B Register (09h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

FREQ_1B[7:0]

FREQ_B[14:7]

189

—

8 MSB of frequency control word B

Detailed Description

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CC1021-RTR1 Datasheet(PDF) 64 Page - Texas Instruments

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